1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7de13c0ca36e3f74516c16d79646a37def9c89a5e6f10eb706676deae7654e4. Chain 2 (Bitcoin): anchored in block 953895 (2026-06-16T05:46:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f2275a5-9268-4b34-bc50-82e69a2d2583.json and https://artists.proofprofile.net/proofs/artist/0f2275a5-9268-4b34-bc50-82e69a2d2583.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ee10e8104c4af4421515a332771f2f7a234fce5cc8439854fea09bf4f3528b. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM1903693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b79c598ddaaf1fe96e39cfe9cc8a7d2786b3697f0ba22c157ba4182a587dce. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM1908387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3d01069c4c3628e7df0d87d0de906eaae1f82d4835bafc3c17a056ade04a8c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM1908391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f6cbbcab463e3dd1f6cafe96c5d91bf6ed934794afc0dc8d66c01a066ff901. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM1901852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d56789f63959af847d073fad8c330687726b123611092c1261701ca7b666946. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM1908392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf281a324b3fb35aef1d5f1ca79f3c41a72e90226c6efe29e33ac07822a572ae. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRNAR1604499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4f5cf1223cd1293d94a857ac98628d87a5da193a2f8b4ee7d44391cc7af0e8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRNAR1604501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81a5c0ee50aa23be61233b10e71f1cb9076898f1a6b373e1cecc00061343598. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRNAR1604503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adddfeba72e75faac7a22b81ebee9139b7b78285f6cc6df2b5a04014f1a454d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSB022501443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65f013021aeec7e8bb6d4886bfb419b93114715900b7bfad1b5441ae2a92b00. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KSB022500414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7296f8e0e498d8291f8427297cfa36da303f20ce1571e77c2fa4a7499a34523f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2434752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaecb6c1deaca79573886a6bdd6d82251e7a7863d452dc5a0934e28da55cecfb. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2366239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25df7517fe6d12d67bfed7c4133e892e1ba7d574567fb88bf8c5a29310079fbc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2349672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14ad8dd953c78344a5128d90afbabe26d879d485c434106c49f7f3be3c5d347. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2111897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2007447a9aefc13245ec57733ca0074dee1d8cc4339c2aec7c989d47935011e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2432839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7d7d80a9be783301debf937389af9debdaffece0ec59202a04a7ffb4073efa. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2008570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2d6d87057269470a4cc0e7b9322530387a04bfc5507884b6c98eb726f9ec7b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRMIM2008573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdaea91cf2f7839f683354a9ede1d77ba37d327dcd05212e4891366af73d1fb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/KRA531701474.
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